A new construction crane has the following specifications: The hook has mass 1000kg the maximum capacity of the hook is 400kg. the constant lifting speed of the hook is 1.5?, and the hook must achieve this speed in 2 seconds at a constant acceleration, beginning at rest. (a) What is the maximum average power the crane motor must deliver to get up to cruising speed? (b) What constant power must the motor supply as the hook rises, after attaining its cruising speed upward?

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Conservation of Energy

In physics, the rule of the conservation of energy states that energy doesn’t disappear from the atmosphere; instead, it changes its form from one type to another. Energy is one of the most important physical quantities in nature, and it cannot be created or destroyed — only transformed.